change by reversal, turn, reverse -- (change to the contrary; "The trend was reversed"; "the tides turned against him"; "public opinion turned when it was revealed that the president had an affair with a White House intern")
turn back, invert, reverse -- (turn inside out or upside down)
overrule, overturn, override, overthrow, reverse -- (rule against; "The Republicans were overruled when the House voted on the bill")